DESCRIPTION The main body ECU (multiplex network body ECU) detects a high beam headlight illumination request signal of the automatic high beam system from the forward recognition camera.
WIRING DIAGRAM 
PROCEDURE
(a) Check the forward recognition camera system. Click here
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Toyota Tundra Service Manual > Blind Spot Monitor System: Dtc Check / Clear
DTC CHECK / CLEAR 1. CHECK DTC (a) Connect the Techstream to the DLC3. (b) Turn the ignition switch to ON. (c) Turn the blind spot monitor system on. (d) Turn the Techstream on. (e) Enter the following menus: Body Electrical / Blind Spot Monitor Master or Blind Spot Monitor Slave / Trouble Codes. HI ...
